Ivan-da-Marya

Since ancient times, the Slavs gave Ivan da Marya flowers strong magical properties. It was believed that plucked on the night of Ivan Kupala, they can become a reliable amulet of the house from any evil forces and charms, as well as the guardian of marital happiness.
The very combination of yellow and blue colors among the Slavs was the personification of Kupala symbols of two opposite elements-fire and water. That is why Ivan-da-Marya is one of the four flowers-attributes of the fortune-telling wreath for the holiday of Ivan Kupala. Slavic peoples believed that the Ivan-da-Marya flower helps to establish the Union of man with the gods, because in it two irreconcilables - fire and water - earthly and heavenly-found their Union forever.
And in Russia, there was a custom to steam in the bathhouse with a broom from Ivan da Marya on Kupala night to gain health, beauty and well-being.